1 / 17

Bleeding and Clotting Time

Bleeding and Clotting Time. Prepared by SARA BAHRAM MIRAN Medical Microbiologist. Clotting Time.

rosson
Download Presentation

Bleeding and Clotting Time

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Bleeding and Clotting Time Prepared by SARA BAHRAM MIRAN Medical Microbiologist

  2. Clotting Time • It is the time taken by blood to coagulate after it has been shed. Coagulation (clotting) of the blood is the most effective defense against bleeding. It is important for the blood to clot quickly when a vessel has been broken, but equally important for it not to clot in the absence of vessel damage.

  3. Clotting Time • The clotting time will be prolonged if the volume of blood per tube or the diameter of the tube is increased, or if the temperature decreased. • The normal range of clotting time is (5-15) minutes.

  4. Clotting Time

  5. Capillary tube method Procedure: 1-Prick a finger with a sterile lancet, fill 2 non heparinzed capillary tube with blood (capillary tube should touch the bleeding point), wipe any excess blood from the outside of the tube. 2- Wait for 4 minutes, then cut the tube after each 30 seconds. 3- Note the time if the fibrin threadis formed between the 2 broken capillary tubes.

  6. Clotting time of whole blood

  7. Bleeding Time

  8. Bleeding Time • The time it takes for bleeding to stop (i.e. the time it takes for a platelet plugto form) is measured. • Normal bleeding time is 3 -6 minutes. • Estimation of bleeding time is not a reliable test, because the results at this test would vary depending on the site and depth of puncture.

  9. Bleeding Time • More ever it is short timed during cold weather due to capillary construction, and reverse case in hot weather. • A prolonged bleeding time may be a result from decreased number of thrombocytes or impaired blood vessels.

  10. Bleeding Time Bleeding time is a test of platelete function. Prolonged bleeding time may be a result of:

  11. Diseases that cause prolonged bleeding time include: Thrombocytopenia.Von Willebrand Disease.Bernard-Soulier disease.Glanzmann's thrombasthenia. • Use of these medications as well prolong bleeding time : Aspirin and heparin.

  12. Dukeś method Procedure: • Clean fingertip or earlobe with spirit and with sterile lancet give at least 2 mm deep prick. • Note the time. - Every 30 second blot off the drop of blood by filter paper until no more blood appear on the puncture site, note the time at which the bleeding has stopped.

  13. Bleeding time Every 30 sec. -

  14. Questions

More Related